Improvement in furnaces



J. LEEDS.

Furnace.

Patented May 30, 1865. V

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U ITE STATES PATENT OFFIC i JOSEPH LEEDs, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN FURNACES.

Specification forming part of Letters Patent No. 17,963, dated May 30, 18th.

To all whom it may concern.-

Be it known that I, JosE H LEEns, of the city of Philadelphia, in the State of Pennsylvania, have invented a new and useful Improvement in Furnaces for Air-Heaters; and I do hereby declare that the following is a full, clear, and exact description of the con struction and operation of the same, reference being hadto the accompanying drawings, making a part of this specification, in which Figure 1 is a vertical longitudinal section of the said improvement applied; and Fig. 2, a transverse section on the dotted line x of Fig. 1, showing the rear portion of the same,

' like letters of referenoeindicating the same parts when in both figures.

My improvement relates to those furnaces or stoves which are designed to be inclosed by brick walls, so as to produce heaters for warming air'for dwellings, 850., and has for its object the economy of both fuel and space with simplicity of construction.

It consists, substantially as hereinafter described and specified in connecting together the fire-chamber and the escape-flue chamber exclusively by means of a series of flat longitudinally-arranged smoke or gas flues having their flat sides vertical and parallel A and B are'in this instance like the same' parts described in the specification accompanying the patent granted to me for an Improvement in Furnaces for Heaters, dated April 2, 1861, with the exception that the width of the escape-flue chamber B is made to correspond with the width of the firechamber A, for the purpose ofallowing the series of the flat gas or smoke fluesO O to be arranged parallel with each other. The back plate, a, of thechamber A has a series of narrow vertical slots, afivmade through it, from one side to the other of the plate, each of which commences from near the top of the fire-box lining a, and extends vertically upward nearly to the top of the chamber. The said slots are each bounded by a flange, a", for receiving tightly over them the front ends of front plate of the chamber B has also a series of flanges, b, which. correspond in form and bers A and B are placed directly opposite .to each other, as in Fig. 1; but instead of havthose of the chamber A, comparatively short openings b b b are made at their lower increasing from the middle to the outer ones, respectively, as indicated in Fig. 2. The flues O 0 connect the chambers A B together by being fitted and cemented air-tight over the flanges a of chamber A and within the flanges b of chamber B, thus producing a series of parallel flat longitudinally-arranged flues which will conduct the hot gas and smoke from the fire-chamber A to the escapeflue chamber B in the directions of the arrows in Fig. 1; and the outlet-openings b b b of the flues O 0 being at the lower edges of the flues and much shorter than their inlet-openings a", the heated products of combustion from the fire-chamber A will be retarded in their progress through them, thus permitting more of the heat of the said products to be radiated from the external surfaces of the flues. v

the outlets of the flues O C from the outer to the inner ones, respectively, as seen in Fig. 2, is to equalize the draft through the whole of them, the heat coming from the middleof the fire-box being stronger than that from either side.

It will be readily seen that in this construction and arrangement of the smoke orgas flues a greatly increased radiating surface is spacein which they are required, thus economizing the fuel relatively, and that the conrangement does not require any boxing or inclosing plates heretofore required around the smoke or gas flues.

Having thus fully described my improvethe respective gas or smoke flues G O. The

position with the flanges (5 when the chaming slots therein to correspond in length with ends only, the lengths of the said openings The object of diminishing the lengths of afforded without materially increasing the struction is comparatively simple, and the arment, What I claim as new therein of my inconstructed and arranged substantialiyin the venticn, and desire to secure by Letters Patmanner described and set forth, for the purent, is poses specified.

Connecting together the fire-chamber and JOSEPH LEEDS.- the escape-flue chamber of furnaces 0r stoves WVitnesses: for air-heaters by means of the series of fiat BENJ. MORISON, smoke or gas flues O C, the said flues being R. F. SHATTUOK. 

